An toànCâu 343 / 360
The most common cross-connection in a home is an outdoor hose faucet, where a hose can be left in a pool, sink, or chemical bucket. What inexpensive device protects against backsiphonage there?
a.A pressure-reducing valve
b.A hose bibb (atmospheric) vacuum breaker
c.A dielectric union
d.A water hammer arrestor
Giải thích
An atmospheric vacuum breaker screwed onto a hose bibb admits air to break the siphon if supply pressure drops, preventing contaminated water from being drawn back through the hose. It is the standard low-cost protection for outdoor faucets and is required on hose connections by the California Plumbing Code. A pressure-reducing valve or hammer arrestor does not stop backflow.
Trích dẫn luật: California Plumbing Code §603Luyện miễn phí toàn bộ 360 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
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- After installing a reduced-pressure backflow assembly on a commercial water service, what ongoing requirement protects the public water supply?
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